From my experience with the following prep book. It’s a short summary for those of you who are trying to find a prep book for the upcoming AP exam.
Baron’s: The Baron’s is quite lengthy and extensive with plenty of unnecessary detailed. Not only that, there’s plenty of mistakes and outdated info since it has not been updated for a while now.
Pearson Test Prep Series: It is very boiled down to the main ideas. It is great for the unit test as it is the barebones and main ideas of the topic but I felt that it was not enough to supplement the applications on the AP exam itself.
Kaplan: Overall this is one of the best books but the test is not nearly enough to practice or helps you prepare well for the AP test
Pearson: reccomend- it is detailed enough for you to not only grasp the concepts but also apply it. Very bland and straight forward. There are plenty of practice test it in to practice.